US76693A

US76693A - Jambs s

Info

Publication number: US76693A
Authority: US
Publication date: 1868-04-14
Anticipated expiration: 1885-04-14

Description

pean- 1W g Letters Patent No. 76,693. dated April 14, 1868.

IMPROVED ELEVATOR.

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TO ALL WHOM IT MAY CONCERN v Be it known that I, JAM-ES S. BALDWIN, of Newark, in the county of Essex, and State of New Jersey, have inve'ntcd a new and improved Method of Constructing Elevators used for transporting passengers; and I do hereby declare that the i'ollowing is a full and exact description thereof, referenccbeing had to the nccompanying drawings, and to the letters of reference marked thereon, making a. part of this specification.

The object of my invention is the prevention of those accidents which sometimes occur through the inter position of some part of the human body between the edge ofthe elevator, while in motion, and the edge of the landings or stationary platforms on the several floors. For this purpose, I apply to the lower side of said edges a yielding bar, or its equivalent, which, being the first part to coine in contact with the interposed body, will be pressed upward, and, this motion being properly transmitted and applied to brakes and ot-her suitable step-gear, the elevator will be checked in its ascent or descent, as the case may be.

There are several ways in which the motion imparted to the yielding bar may be transmitted and applied. I shall proceed to describe that which I prefer to use in most cases.

Let A, Figure I, he the'platform of th'e elevator, moving between the slides B B B B. P is the edge of the landing, and Q the outline of an interposed body, which, coming in contact with the yielding bar D, as'abovc mentioned, will move it, together with the lever G'and ecc'entric' C, the latter, in -turn, pressingthe broken. firmly against the fixed slide B. If necessary, the brake E ean'either be repladed or assisted by a dog, engaging a rack, as in Figure II. I

The connecting-rod K', attached to G, and also to the end, g, of the bent lever K 7:, will, upon the slightest upward motion of D, cause the rod or cord L L to be firmly grasped between the end, is, of said lever and the end, It, of the fixed arm H h, and the cord or red will then move as if it were apart of' the elevator. The functions of this red or cord are the same as those of a similar part of the elevators at presentinus'e. shuts off the steam, or otherwise disconnects the motive-power, and, if necessary, applies a brake or similar cheekmotion to the drum on which the rope is wound, or to whatever machinery may be used instead of said drum but, instead of being moved by the hand 'ofthe attendant, by-rny plan it is operated automatically by the action of an interposcd body on D. I i

In some cases, to insure speedy action, it is necessary to employ a reserve force, which, being released or called into action by a slight pressure on D, will cause the movement of the scvcrzil' parts, as' hereinbefore described, to be madcatoncc. I regard a spring, as represented by X in Figure III, as the best example of sncha reserve force, although there are several equivalent methods that maybe employed. The said spring tends to draw Gforcibly upward; but this motion is rcstrained by thejointcd brace Y Y, so long as its two portions are in line with each other; but, when this alignment is disturbed by'a slight movement of the yielding bar D, attached to the bent prolongation of Y, the brace yields, taking the position sho'wn in outline, and1G moves, together with its attached parts, as in Fig. I. v, I

The application of the several parts hereinbei'orc described to the several landings is made in the same manner, except that the cord or rod L L is directly attached to G or G, as shown by the dotted outline L L, Fig. I, and B is replaced by some portion of the elevator occupying the same relative position, or by some port-ion of the machinery occupying the same relative position, but located at a convenient distance from the elevator itself.

What I claim as my invention, and desire to secure by LettcrsPatent, is-

The checking or stopping of the elevator by the. pressure of an interposed bodyupon the bar D, or its equivalent, said pressure being transmitted and applied by the means and substantially in the manner described.

JAMES S. BALDWIN.

Witnesses:

S. BALDWIN, S. A. BALDWIN.